Have your driving record ready
Mostly just make sure your driving record is good put on a nice shirt and understand how amazon delivery works if you are not already an amazon customer research it or ask your friend who has prime. be able to explain your experience driving larger vehicles.
Looking back, I wouldn't go. But if you do have an interview, bring a resume, a driver's abstract, find out the history of the company, be confident, willing to do whatever it takes to land a position.